Failed to log into NFC server

I am getting the following error message trying to to upload or download files directly from VMware ESXi 5 by browsing the data store. I have used a different installation of the vSphere Client to upload /download my files from the VMware datastore. I didn’t get any issue using different client. I think there is a client issue please suggest me in a proper way. I am using Win 8 OS. Thanks.

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